I'm considering a high-end A.O.Smith water heater. It is the FGT-75 and it has Low NOx Infra Red technology. It has a high EF and thermal efficiency, and appears to be the only one of the "Conservationist" models with this design. I am curious if anyone has had experience with this model/technology. I'd hate to buy this thing and find it unreliable. Thanks! :-)